需求

1.进度条里面的文字需要根据进度的长度而变化

原理

用两个一模一样的样式的 div 重叠起来

效果

字体开始为蓝色，跟随进度条变为白色

在线预览：

代码

<!DOCTYPE html>

<html lang="cmn-hans">

<head>

    <meta charset="utf-8">

    <meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, minimum-scale=1, user-scalable=no">

    <script>!function(e,t){function n(){t.body?t.body.style.fontSize=12*o+"px":t.addEventListener("DOMContentLoaded",n)}function d(){var e=i.clientWidth/10;i.style.fontSize=e+"px"}var i=t.documentElement,o=e.devicePixelRatio||1;if(n(),d(),e.addEventListener("resize",d),e.addEventListener("pageshow",function(e){e.persisted&&d()}),o>=2){var a=t.createElement("body"),s=t.createElement("div");s.style.border=".5px solid transparent",a.appendChild(s),i.appendChild(a),1===s.offsetHeight&&i.classList.add("hairlines"),i.removeChild(a)}}(window,document);</script>

    <title>进度条渐变</title>

    <style type="text/css">

        * {

            box-sizing: border-box;

        }

        .box{

            position: fixed;

            left: 50%;

            transform: translate(-50%);

            width: 320px;

            height: 44px;

            background-color: white;

            color: #00a0e9;

            border: 1px solid #00a0e9;

        }

        .process{

            position: absolute;

            height: 100%;

            width: 0;

            background: #00a0e9;

            color: white;

            overflow: hidden;

            z-index: 10;

        }

        .process-text{

            position: absolute;

            left: 160px;

            top: 50%;

            font-size: 12px;

            transform: translate(-50%, -50%);

            white-space: nowrap;

        }

    </style>

    <script>

        function process() {

            var t = 1;

            var max = 320;

            var progress = document.getElementById("process");

            var process_texts = document.getElementsByClassName("process-text");

            var interval = setInterval(function () {

                if (t == max) {

                    clearInterval(interval);

                    for (var i in process_texts){

                        process_texts[i].innerHTML = '完成'

                    }

                } else {

                    progress.style.width = t + "px";

                    for (var i in process_texts){

                        process_texts[i].innerHTML = '进度' + (t / max * 100).toFixed(2) + "%"

                    }

                    t++;

                }

            }, 10)

        }

    </script>

</head>

<body>

<div class="box" onclick="process()">

    <div class="process" id="process">

        <span class="process-text">点击开始</span>

    </div>

    <span class="process-text">点击开始</span>

</div>

</body>

</html>

巴特西

css 进度条的文字根据进度渐变

需求

原理

效果

在线预览：

代码

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